If you don't mind the fab work and you want cheap. Just buy the cheapest jackshaft you can find ($30) and make your own. I've been looking into it for a year now and seen all the options out there! I don't want all the fab work and I want bullit proof one way bearings. So the best option for me is to save up a little more money and then I'm going with the sick bikes. Hell it took me a year to build this bike and I have about $1,000 in it now! I love it! So for me there no need to rush and replace later. I've learned if you want a bike that will last and be hassle free, nothing is straight out of the box! I've been reading this form and doing my home work. Mainly letting other people make my mistakes for me. lol I've found tapping into the huge amount of knowledge of this form has been priceless! Thank to everyone for all there help